======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '781'
                                          'artist'  'Elephant9'
                                     'text_people'  ''
                                         'release'  'Dodovoodoo'
                                           'title'  'Doctor Honoris Causa'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'fusion', 'jazz', 'progressive rock', 'jazz fusion']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '7'
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '135.819'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 000003C9 00000415 00004013 000046E0 00062A43 0006CEA7 00008531 0000866A '
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'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 000007B0 00000000020E20C0 00000000 011E45B7 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '7+105E3E1AFEEA8AE748CAFADBA68C353A+11276247'
'TALB' (Album/Movie/Show title)                     'Dodovoodoo'
'TBPM' (BPM (beats per minute))                     '135.819'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '2008'
'TENC' (Encoded by)                                 'iTunes v7.6.2.9'
'TIT2' (Title/songname/content description)         'Doctor Honoris Causa'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Elephant9'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '6/7'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['instrumental', 'fusion', 'jazz', 'progressive rock', 'jazz fusion']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.11 dB'
'TXXX:replaygain_track_peak'                        '0.641569'

========================== row from database ==========================
                                              'id'  1246300
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Elephant9/Dodovoodoo/06 Doctor Honoris Causa.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  781
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  18866248
                                           'mtime'  1620528652
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 06 prerock jb jazz unsorted
                                      'tag_artist'  Elephant9
                                     'tag_release'  Dodovoodoo
                                       'tag_title'  Doctor Honoris Causa
                                             'bpm'  135.819
                                    'search_title'  'causa':3 'doctor':1 'honoris':2
                                   'search_artist'  'elephant9':1
                                  'search_release'  'dodovoodoo':1
                                     'search_rest'  'country':4 'exotica':2 'jazz':1 'jb':6 'oldies':3 'prerock':5 'unsorted':7
                                    'search_combo'  'causa':3A 'country':9 'doctor':1A 'dodovoodoo':5C 'elephant9':4B 'exotica':7 'honoris':2A 'jazz':6 'jb':11 'oldies':8 'prerock':10 'unsorted':12
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-4', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['instrumental', 'fusion', 'jazz', 'progressive rock', 'jazz fusion']
                                        'tag_date'  2008
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620528651.642194  (2021-05-09 04:50:51)
                             'size'  18866248